The Sync Subtitles lets you shift or rescale subtitle timings directly in your web browser. Your file is processed on your device and never uploaded, so it stays completely private. It's free, needs no sign-up and works on any device. You may also know this Sync Subtitles tool as Sync Subtitles, Sync Subtitles online and Sync Subtitles free.
How to use Sync Subtitles
- Upload your subtitle file to the Sync Subtitles.
- Enter how many seconds to shift the subtitles (and a speed scale if needed).
- Click Process.
- Download the re-synced subtitle file.
Why use this Sync Subtitles tool?
- 100% private — your files are processed on your device and never uploaded.
- Free & unlimited — no sign-up, no watermarks, no daily caps.
- Works everywhere — any modern browser on desktop, tablet or phone.
- Fast — no waiting for uploads or downloads from a server.
Also known as
Sync Subtitles, Sync Subtitles online, Sync Subtitles free, free Sync Subtitles.
Sync Subtitles FAQs
How do I fix subtitles that are out of sync?
Upload your subtitle file, enter how many seconds to shift them, and download the corrected file.
Should I use a positive or negative shift?
If subtitles appear too early, shift them later. If they appear too late, shift them earlier.
Is the Sync Subtitles free?
Yes. Every DigiToolkit media tool is completely free, with no sign-up and no watermarks.
Are my files uploaded to a server?
No. The Sync Subtitles runs entirely in your browser. Your files never leave your device, which keeps them private.
Do I need to install anything?
No. The Sync Subtitles works in any modern browser on desktop or mobile — nothing to download or install.
Which subtitle formats are supported?
SubRip (.SRT), WebVTT (.VTT), Advanced SubStation Alpha (.ass) and SubStation Alpha (.ssa), plus plain text (.txt).
Will my timings stay accurate?
Yes. Timestamps are parsed precisely to the millisecond and converted without rounding errors.
Does it work on mobile?
Yes, it is mobile-friendly and works on phones, tablets and desktops.
